16214409 has 6 divisors (see below), whose sum is σ = 23420826. Its totient is φ = 10809600.

The previous prime is 16214381. The next prime is 16214417. The reversal of 16214409 is 90441261.

It can be written as a sum of positive squares in only one way, i.e., 14175225 + 2039184 = 3765^2 + 1428^2 .

It is not a de Polignac number, because 16214409 - 2⁵ = 16214377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16214309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 900792 + ... + 900809.

It is an arithmetic number, because the mean of its divisors is an integer number (3903471).

Almost surely, 2^16214409 is an apocalyptic number.

It is an amenable number.

16214409 is a deficient number, since it is larger than the sum of its proper divisors (7206417).

16214409 is a wasteful number, since it uses less digits than its factorization.

16214409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801607 (or 1801604 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 16214409 is about 4026.7119340723. The cubic root of 16214409 is about 253.1047960097.

The spelling of 16214409 in words is "sixteen million, two hundred fourteen thousand, four hundred nine".